Cans don't really last that long ... for a poor man I would use a vacuum sealer.
This is the sealer he uses for everyday items, but they have sealers for up to 2 and 3k dollars
https://www.amazon.com/FoodSaver-Vac...language=en_US
Here's a man up in Canada that is into vacuum sealing ... He even seals water
Here's one of his followers good advice:
Quote:
Just a quick technique tip - I don’t pack/store anything I’ve sealed for about a week. Sometimes you don’t get a good seal, but you don’t know it. By waiting about a week, you’ll see if your bags are still tight. If they’re loose, air has gotten in. I also check all of my vacuum sealed preps every 6 months. It only takes a teeny tiny hole to break the seal, so sometimes you find something that needs to be re-sealed or used.
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